SQL tuning remains the bread and butter of performance optimization. In 12c Release 2, the optimizer has become significantly smarter, but it still requires human intervention for outlier cases.
Technique: Monitor adaptive plan changes via DBMS_XPLAN.DISPLAY_CURSOR with '+ADAPTIVE' . SQL tuning remains the bread and butter of
12.2 introduced OPTIMIZER_ADAPTIVE_REPORTING_ONLY . In 12.1, adaptive plans were mandatory if statistics were stale. In 12.2, you have control. the optimizer has become significantly smarter
BEGIN DBMS_WORKLOAD_REPOSITORY.CREATE_BASELINE_TEMPLATE( start_time => '2025-01-01 00:00:00', end_time => '2025-12-31 23:59:59', baseline_name => 'Peak_Season', template_name => 'Seasonal_Template', expiration => 365); END; SQL tuning remains the bread and butter of